Rubber tire.



am 0 9 1 0W 2 E N U TU D E T N E T A P U. GROTZ.

RUBBER TIRE APPLICATION TILED APB. so, 1003.

N0 MODEL UNITED STATES Patented June 23, 1903.

PATENT OFFICE,

CHRISTIAN GROTZ, OF AKRON, OHIO.

RUBBER TIRE.

SPECIFICATION forming part of Letters Patent N 0. 731,677, dated June23, 1903. Application filed April 30, 1903- Serial No, 154,965. (Nomodel.)

To all whom it may concern:

Be it known that I, CHRISTIAN GROTZ, a citizen of the United States,residing at Akron,

' in the county of Summit and State of Ohio,

have invented a certain new and useful Improvement in Rubber Tires, ofwhichthe following is a complete specification.

My invention relates to acombined metallie and elastic tire forvehicles.

The objects of my invention are to so construct a tire for vehicleswherein a metallic tire is combined with an elastic cushion of somesubstance affording great resiliency in such manner that the metallicportion of the tire will serve to assist'and retain the elastic portionin proper position and aiford a seat therefor and in which the elastictire will I described and then specifically clalmed, refserve to preventthe contact of the iron tire with the ground and one in which meansinclosed within the body of the elastic tire will serve to assist inretaining; it in proper place upon the metallic tire.

Another object is to produce a combined metallic and elastic tire inwhich the ordinary side flanges may be dispensed with and still producea tire in which the seating and re taining of the elastic portion can beaccomplished readily and with such firmness that it will besubstantially impossible to remove the elastic portion fromthe metallicportion unintentionally.

To the accomplishment, of the aforesaid objects my invention consists inthe peculiar and novel construction, arrangement, and combination of thevarious parts hereinafter erence being had to the accompanying drawing,forming a part hereof.

In the drawing, which represents a crosssectional view of my improvedtire, 1 is the a rubber tire, in the base of which are two channels orgrooves and through the lower central portion and slightly above thechannels just described is an opening for the insertion of alongitudinal wire 5. The rubber or elastic tire is adapted to seat on apeculiarly-shaped metallic tire, which has a flat bottom or base to reston the wooden felly 3, and the outer side edges of this metallic tireare rounded and the upper face is slightly dished or clownwardly slopingtoward the transverse center of the tire. On either side of thetransverse center of the metallic tire are two ridges 4,

made integral with the main portion of the metallic tire and risingslightly therefrom.

Between these ridges 4 the tire is cut away,

and its vertical diameter is lessened and is considerably thinner thanthe portions of the tire outside of the ridges 4.

In constructing this combined tire the metallic tire 2 is shrunk ontothe felly 3 or retained thereon by any of the ordinary means forretaining metallic tires in place. The

elastic tire, through which has been placed a otherwise, and the elastictire l is slipped over the joint formed by this brazing, and the endsare united by cement or any other means preferred.

In constructing the elastic tire I embed in the body, at intervalsvarying from one to two inches, transverse wires 6, the ends of whichare intended to extend transversely far enough to reach the upperportions of the channels cut in the base of the elastic tire and to restupon the ridges 4 011 the metallic tire when the two tires are united.Between the ends of the transverse wires 6 they are intended to incloseby one or more convolutions the opening formed in the elastic tire forthe reception of the longitudinal wire 5, so that the inward pressure ofthe longitudinal wire, which results from drawing it tightly whileplacing the elastic tire in position, is borne or sustained to a certaineX- tent upon the transverse wires 6 and from them distributed onto theridges 4 of the metallic tire.

It will be noticed that the inclined outer sides of the elastic tire donot quite reach the outer edge of the metallic tire 2. This is done forthe purpose of protecting the sides of the elastic tire from abrasionsin crossing street-car tracks and similar obstructions met with in theuse of vehicle-wheels.

It will be noticed in the construction of this tire that a comparativelylarge amount of elastic material is left around the longitudinal wire 5,and thus the danger that the wire 5 will tear out of its seat in theelastic tire is substantially done away with.

What I claim, and desire to secure by Letters Patent. is-

1. A combined metallic and elastic tire con sisting of a comparativelyfiat metallic tire 'provided with ridges projecting therefrom andextending circuinferentially thereto in combination with an elastic tireto inclose said metallic tire and ridges and rest thereon, of alongitudinal wire arranged to be embedded in said elastic tire andtransverse Wires embedded in said elastic tire arranged to inclose saidlongitudinal wire and to be supported by the ridges of said metallictire.

2. The combination in a tire of the class stated of a comparatively fiatmetallic tire with circumferential ridges thereon, an elas tic tiretorest on said metallic tire and inclose said ridges, a longitudinalwire adapted to pass through said elastic tire, transverse wires adaptedto form one or more convolutions about said longitudinal Wire and toengage with its ends the upper portions of said ridges.

3. The combination in a tire of the class designated involving anelastic tire, a longitudinal wire embedded therein, ridges projectingfrom a metal tire forming a base for said elastic tire and transversewires adapted to be connected with said longitudinal wire and besustained by said ridges.

4. A combined metallic and elastic tire consisting of a comparativelyflat metallic tire, two ridges projecting therefrom and extendingcircumferentially around said tire, an elastic tire to embrace saidridges, a longitudinal wire embedded in said elastic tire slightly aboveand centrally between said ridges and transverse wires resting on thetops of said ridges and forming one or more convolutions about saidlongitudinal wire, substantially as shown and described.

In testimony that I claim the above I hereunto set my hand in thepresence of two subscribing Witnesses.

CHRISTIAN GROTZ.

In presence of- O. E. HUMPHREY, MAUDE ZVVISLER.

